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Shimano Dura-Ace Di2 7970 specs
ST-7970 Dura-Ace Di2 Dual Control levers
● Unidirectional carbon fiber lever blades reduce weight without loss of durability
The Di2 shifter: An ergonomic redesign
The Di2 shifter: An ergonomic redesign
● Shifting positions mimic Dual Control with the ease of an electric switch
● Titanium clamp and fixing bolt
● Enhanced perch shape is more comfortable over longer distances
● Integrated reach adjuster provides a custom fit for even smaller hands
● Shift impulses transmitted in fractions of a second
● Revised brake cable pivot location provides better braking modulation
● Optional satellite shifter
● Wiring harness is FlightDeck ready
● 255g
RD-7970 Dura-Ace Di2 rear derailleur
● Carbon fiber rear pulley cage for lighter weight without loss of durability
● New geometry allows for use of 27 tooth max cog
● Servo saving feature allows derailleur body to move inward on impact to reduce or eliminate damage to the component and servo motor
● 225g
FD-7970 Dura-Ace Di2 front derailleur
● Integrated CPU monitors both front and rear shifting for precise and consistent derailleur alignment
● Computer integration allows the front derailleur to track the chain eliminating the need for manual trim and also eliminates chain drop when shifting inward from the big ring.
● 124g
The lithium-ion battery pack holds a 1000-kilometer charge
The lithium-ion battery pack holds a 1000-kilometer charge
SM-BTR1 Dura-Ace Di2 battery
● High performance Lithium Ion composition
● Rechargeable (1.5 hours for full charge)
● Mounting bracket to easily adapt to most bikes
● Approximately 1000 kilometers of heavy use between charges - 7.4V
● 68g
SC-7900 Flight Deck cycle computer
● Gear indicator with virtual cadence
● Heart rate monitor
● Estimated caloric consumption
● Altitude & inclination
● Battery life indicator
● Wireless PC connection
Stefan Schumacher of Germany speeds down Ombarde Pass using Shimano's Di2 electronic shifting system during the 2008 Tour De France.
Photo: Christophe Ena/AP
Shimano Di2 - time trial
